Bolt anchor



Aug.16.1927. '1,639,231

J. E. OGDEN BOLT ANCHOR Filed May 19, 1 923 2 Sheets-Sheet 2 4 j@ 'g Z/5' 46 IN VN TORl Patented Aug. 16, 1927.

JOHN EDWARD OGDENOF MOUNTAINVILLE, NEW .YORK.

' BOLT ANCHOR.

Application led May 19,

This invention relatesto improvements in bolt anchors of the character:employed yfor obtaining anchorage in walls ofbriclr, stone orcernentitious material notadapted to di-` rectly receive a threadedmember.

One of the objects of thek invention is to provide an expansion Yshieldso constructed and arranged as to possess ,superiori gripping qualities.

Another yobject of the invention isv to provide ya [shield and`expanding1 elements adapted to coact therewith, the shield and.elements being so relatively constructed and arranged as to'effectgripping connections at a plurality of diiiferent pointsor areasthroughout the length of the shield.v

Another object of the invention is to providea vbolt anchor thatcanbe'set deep in awall opening or spaced' inwardly from the outer edgeof the opening whereby the expansion thereof will not spall theconcrete.

Further objects kof the invention willv appear from the `followingspecification taken yin connection with the drawings, which form a partof this application, and in which Fig. lis an elevational viewillustrating a bolt anchor positionedin a wall opening' yand constructedin accordance with the in# vention.

Fig. 2 is aview similar to Fig. lbut show.-` ing the outer end of theshield expanded and the inner endvpartially expanded.

Fig. 3is a view similar tol Figs. 1` ,and 2, but showingbothjends of theshield expanded.

Fig. e is anpelevational view showing the shield and expanding elements.

Fig. 5 .is an end Vlevation of the innerA i endy f the bolt anchorillustrated in` Fig. `1.

Fig.. 6 vis an end elevation of the oppositev end of the boltanchor.

Fig. 7 is a transverse sectional elevation taken substantially on line7-7 of Fig. 4.

Fig. 8 is alongitudinal sectional elevation of a bolt anchorillustratedin Figs. 1 'to 4.

Fig. 9 is an elevational V'view of thepex-k panding sleeve used at theouter end ofthe shield. l Y

Fig. A1() is an end elevation of the inner or tapered end of the sleeve.

Fig. 11 isan end elevationr of end of the sleeve."

yFig. 12 is an elevationalviewY similar to the opposite Fig.` 11, butshowing the` sleeve as made up of apair of sections.

l A i is a view similar to Fig. 12, hat` 1923. serial No. 640,097.

showing a pair of sections, the plane of division betweenthe sectionsbeing at right 'angles to the plane of division between the of anexpansion shield having expansiblev portions atboth ends and expandingelements at'both ends for expanding saidportions. In the embodiment ofthe invention shown the expanding element for the inner end consists ofa nut tapered longitudinally and adapted to travel-longitudinally in theshield and force the expansible portions outwardly. The expandingelement `for the lopposite end of the shield consists of a sleeveadaptedto be positioned within the outer endy of the shield.v The sleeveand shield Yhave coengaging portions v'such as lan inturned tab on Atheshield disposed vwithin an elongated slot in the sleeve. The shield isexpanded by forcing the sleeveinwardly and by drawing the nut-y inwardlyinto the shield thereby pressing the exp'ansible' portions radiallyoutward into Lfirm gripping engagement with the wall opening. Furtherdetails Vol the invention will appearfrom the following description.y

In the particular embodiment of t-he invention show-n, the expansionshield comprises a pair of sections 2O and 21 which are secured togetherintermediate their ends by a splitlring l22 seated in an annular depres-`sion 23. The shieldVV is adapted to be expanded at Abothfends and isformedV at its respective ends with?A a plurality of longitudinallyextending, preferably tapered.

Vfingers '24 and 25.` 'The fingers 24 are inturnedattheir ends as shownat 26 and these ends 26 as shown in Fig. 5 overlap the outer end of the`expanding nut 27 and retain the nut withiny the shield.

The nut 27 has a substantially square end 28 and aA conical opposite end29, these ends being; connected `by tapered,k portions; 30 adapted toengage and expandtlie shield.

particular shape 'of the inrit 's'not l the sleeve 33.

12 and 13.

portant and any desired form of tapered expanding element may be used.

Certain of the tapered fingers 25 at the opposite end of the shield areturned inwardly as shown at 31. These inturned ends are received inlongitudinal slots 32 formed in a sleeve 33. The remaining fingers 25which are indicated at 25X are not inturned but lie along the flatsurfaces of the sleeve 33 and function as guides, and retainers for thesleeve and are made of the proper lengths to gauge the position of theshield in the hole. The sleeve 33 as particularly shown in Figs. 9 to 11is tapered at one end as shown at 34 and is substantially square.

in section at the other end and attention is called to the fact that thesleeve 33 is formed of heavier stock or is thicker than the wall of theexpansion shield.

When the bolt anchor is Vassembled the parts are disposed in theposition illustrated in Figs. 4 and 8 Where the nut 27 is disposedwithin the tapered fingers 24 at one end of the shield and the sleeve 33is disposed within tapered fingers 25 and 25X at the other end of theshield. The inturned ends 31 of certain of the fingers 25 are located inthe slots 32 in the sleeve 33 and the other fingers 25 as shownparticularly in Fig. 6 extend along the flat outerV faces of The sleeveillustrated in Figs. 9, 10 and 11 is formed from a single piece ofmaterial but the sleeve may be sectional as shown in Figs. In Fig. 12the sections are divided in a plane at right angles to the center lineYof the slots 32 and in Fig. 13 the sections are divided in a planecoinciding with the center line of the slots.

In Figs. 14 and 15 the shield comprises a pair of sections 4G and 41having tapered fingers 42 formed at one end only theieof. At theopposite end are formed inwardly extending tabs 43 adapted to bepositioned in the slots ofthe sleeve.

1 In Figs. 13 to 18 inclusive a slightly dif ferent shape of sleeve isillustrated. The sleeve in this instance comprises a pair of sections'45 and 46 having longitudinally extending, tapered ridges orcorrugations 47. Slots 48 corresponding tothe slots 32 in the other formof sleeve are disposed with their vcenter line coinciding with the planeof di- `the insertion of the shield in the hole. Af-

ter the anchor has been so inserted, the nut 27 and the sleeve 33 can bedrawn together lengthwise in the shield by means of the bolt 50 or inany other suitable manner a sufficient distance to cause the ends of theVshield to expand into engagement with the wall opening as shown in Fig.2. The bolt 50 can then be withdrawn and the sleeve can be driven inflush with the surface of the wall it this has not been accomplished bythe previous operation, thereby expanding this end of the shield intofirm gripping'V 4 engagement with the wall opening.

Attention is called to the fact that the expansible portions of theouter end of the shield are spaced'inwardly tromA the outer edge of theWall opening and, therefore, the expansion of thisV end of the shielddoes not spall the concrete. The bolt can then be reinserted and theobject 51 to be secured in position Y can be firmly supported. As thebolt 50 is turned Vin the nut 27, the nut will be drawn longitudinallyin the shield to some such position as that illustrated in Fig. 3 ifthis end of the shield has not been fully expandl ed by the previousoperation. In this Yfigure it will be seen that the shield is expande-fli into firm gripping engagement with the wall opening by the nutand bythe sleeve.

Another method of expanding this shield.

would be to place it Within the hole sothat Y the outer end of thesleeve 33 Vis flush with the surface of the wall or slightly protruding.The work 51 is then placed in position and the bolt 50 inserted. Vilhebolt '50 when manner as those illustrated in the VIn'eceding figuresand. therefore, a description ofthe use thereof is not deemed necessary.Y

The corners of nut 27 and'of the sleeve 33 `are drawn into the interiorof the shield in the fully expanded positions Vand there is no tendencyfor them to be released when the bolt 50 is removed. The bolt can beremoved at will without disturbing the shield.

Although certain specific embodiments of the invention havebeenparticularly shown and described, it will be understood that theinvention is capable of modification and' that changes in theconstruction and,V in the arrangement of the various cooperating partsmay be made without departing from the spirit or scope of the inventionas eX- pressed in the following claims.

TNh'at l claim is:

1. In combination, an expansion sh-ield i comprising a plurality ofsectionseach section having a plurality of longitudinally e};- tendinglingers at each end thereof,` said fingers being tapered in width, andexpanding elements disposed within said fingers.

2. In combination, an expansion shield comprising a plurality ofsections, each section having a plurality of longitudinally extendinglfingers at each end thereof, said fingers being tapered in width, andexpanding elements disposed within said fingers, one of said expandingelements having flat surfaces engaged by the inner surfaces of thenngers.

3. In combination, an expansion shield comprising a plurality ofsections. each section having a plurality of longitudinally extendinglingers at each end thereof, said fingers being tapered in width, andexpanding elements disposed `within said fingers, one of said expandingelements having fiat surfaces engaged by the inner surfaces of thelingers and having portions disposed between said fingers. l

4. A bolt anchor comprising a sheet metal expansion shield havinglongitudinally extending fingers with inturned end portions and atapered sleeve for expanding said shield having slots receiving theinturned ends of the fingers, the ends of the slots limiting themovement of the sleeve relative to the shield. Y

5. A bolt anchor comprising an expansion shield having longitudinallyextending fingers with inturned end portions and a tapered sleeve forexpanding' one end portion of said shield having slots receiving theinturned ends of the fingers, and a tapered expanding element for theother end of said' shield.

6. A bolt anchor comprising a shield having expansible portions and asleeve adapted to expand said portions and having a slot' thereinintermediate the ends thereof, said shield having a tab received insaidslot and confined by the ends thereof.

7. In a bolt anchor, an expansion shield comprising a plurality ofsections, each section having longitudinally extending fingers at eachend thereof and' a pair of tapered expanding elements adapted to travellongitudinally in said shield andexpand said ngers said expandingelements having flat surfaces engaged' by said fingers.

8. A bolt anchor comprising an expansion shield having longitudinallyextending tapered fingers at both ends thereof and expanding elementsdisposed within said fingers, one of said expanding elements consistingof an elongated sleeve extending beyond the end of the shield, saidelongated sleeve being provided with longitudinal slots, and the ends ofsome of the tapered fingers at the end of the shield within which said'sleeve is disposed being inturned to engage said slots.

9. A bolt anchor comprising an expansion shield having longitudinallyextending tapered fingers at both ends thereof and expanding elementsdisposed within said fingers, one of said expanding elements consistingof an elongated sleeve extending beyond the end of the shield, saidelongated sleeve being provided with longitudinal slots shorter thansaid sleeve, and the ends of some of the tapered fingers at the end ofthe shield within which said sleeve is disposed being inturned to engagesaid slots, the engagement of the int-urned fingers with the ends of theslots being arranged to limit the longitudinal movement of the sleeve.

10. A bolt anchor comprising an expansion shield having longitudinallyextending spaced fingers at each end thereof and an expanding element ateach end of said shield having substantially flaty surfaces engaged bythe inner surfaces of said fingers and parallel to the shield axis.

11. A bolt anchor comprising an expansion shield having longitudinallyextending spaced fingers at each end thereof and an expanding element ateach end of said shield having substantially fiat surfaces contactingwith the inner surfaces of said fingers and parallel to the shield axisand having portions extending between said fingers.

12. A bolt anchor comprising an expansion shield having longitudinallyextending spaced fingers atr each end thereof and an expanding elementat each end of said shield having substantially flat surfaces adjacentsaid fingers, one of said expanding elements having a slot therein andone of the fingers having an offset end received in said slot wherebyrelative movement between the said slotted element and the shield islimited.

. 13. A bolt anch-or comprising an expansion shield havinglongitudinally extendingv fingers at each end thereof, a threadedexpanding element disposed within said lingers at one end of the shieldand a sectional Ahollow tubular expanding element at the other end ofthe shield, and means engaging the sections ofthe tubular element forlimiting the movement of said element relative to said shield.

14. A bolt anchor comprising an expansion shield having longitudinally4extendingfingers and a hollow sleeve for expanding Y the shield andhaving flat surfaces contacting with said fingers, and means forlimiting the movement ofsaid sleeve relative to said shield.-

15. A bolt anchor kcomprising an expansion shield having longitudinallyextending fingers and a hollow sleeve for expanding the shield andhaving Hat surfaces contacting with said fingers, and means for limitingthe movement of said sleeve in both directions relative to said shield.

In witness whereof, I hereunto set my hand this 17th day of May 1923.

. 1 JOHN nnwxznn oennn.

